Pipe-joint.



PATENTED DEG. 3, 1907.

J. G. LIDDELL. PIPE JOINT.

. APPLIOATION FILED un. 2a, 1907.

3 SHEETS-SHEET 1.

I No. 872,358. PATENTED DEG. 3,*1907.

J. G. LIDDEL-L.

PIPE JOINT.

APPLICATION FILED FEB. 23. 1907.

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@Hannut JOHN G. LIDDELL, OF EAST WALPOLE, MASSACHUSETTS.

PIPE-JOINT.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed February 23| 1907. Serial No. 358.930.

`of Massachusetts, have invented new and useful Improvements in Pipe Joints, of which the following is a specification.

This invention relates to improvements 1n pipe joints, and .more especially to that class of pipe joints used to supply steam to rotating cylinders or drums such as are in common use *in paper machines, and other drying or heating apparatus.

One` object of the invention is to rovide a joint of this character which shall e steam tight, and which will not be readily subject to' leakage through wearing of the parts.

Another object is to provide a revolving pipe joint which shall be simple and e'llcient, and which may easily be taken apart for inspection or repair.

With the above and other objects in view, as will appear as the nature of the invention is better understood the same consists in the combination and arrangement of paits, and

in certain details of construction hereinafter ing drawings, forming part of this specification, and in which:-

Figure 1 is a longitudinal section through the improved joint, and associated parts;

Fig. 2 is a transverse section onl the line 2-2, of Fig. 1, looking in the direction of the arrows;` Fig. 3 is aview of one face of a cylindrical member, hereinafter described; Fig. 4 shows a sealing plate hereinafter referred to Fig. 5 is a view similar to Fig. 1, showing a modified form of the invention; Figs. 6 and 7 illustrate modifications of the parts shown in Fi s. 3 and 4, res ectively.

Re erring to the rawings in detail, 1 designates a drum or roll such as is used in paper manufacture and other arts. This drum is supported on journals 2, over the end of which is tightly secured a cap 3, by means of stud bolts 4. 'The steam pipe 5 is screwed into a cylindrical frame or casing designated in its entirety as 6. On its outer end this casin is closed by means of a head 13, secure as b bolts 15 and provided with a central tub ar extension 14 hereinafter referred to.` At its opposite end the casing 6 is formedwith a central aperture for the passage of the steam pipe 11, and around this aperture is constructed a hollow annular space or chamber 16.

Arranged within the casing 6 is a cylindrical head or member 8, hereinafter referred to as the swivel block. This swivel block is of smaller diameter than the interior bore of casing 6, and is centrally disposed therein so as to preserve a space 7 between itself and the walls of the casing. As shown in Figs. 1 and 3 this swivel block is provided near one end with a chamber 17 communicating with a series of parallel ports or openings, extending axially from the chamber 17 to the fartherl face of the block, and in its other face with holes or sockets 19 for the reception of a wrench or other tool. The swivel block is also provided with a series of radially arranged ports l) forming communication between the periphery of the block, and a central chamber 10. Opening into this chamber is one end of a pipe 11, the same being rigidly screwed into the swivel block. This pipo is of relatively large diameter and connects at its other end with the cap 3, as above described. Arranged centrally within this pipe 11 is a smaller pipe 20 which passes through. the chamber. 10 and screws securely into the block 8 in such manner as to be in communication with the chamber 17. Its other end extends a suitable distance within the roll or drum 1.

Between the inner wall 21 of the annular chamber 16, and the rear face of the swivel block 8 is located what is termed a sealing plate 22. This consists of an annular disk embracing the ipe 11 and retained in its central positionpby means of an internal annular flange 23, projecting from the inner wall of the casing 6 and preferably formed inteUral therewit cLet into each face of the plate or disk 22 is a pair of acking rings 24 and 25, 26 and 27 compose of some soft material and arranged one Without the other concentrically so as to preserve a spacebetween them. One air of rings seat tightly against the face of b ock 8 and the other pair against the wall 21 of casing 6. In the `space between the concentric pairs of acking rings the plate 22 is'pro- -vided wit a series of circularly disposed arcshaped slots 28 as clearly shown in Fig. 4. The wall 21 is also provided with a series of similar slots, 29, as clearly shown in Fig. 2. Both these series of slots are ranged on circles of the same radius, and also of the same raidusas that on which ports 18 in block 8 are disposed, the result being that all three sets of ports or slots aline, as shown in Fig. 1. It will thus be seen that by virtue of the steam tight joints formed by thepacking rings, a closed passage is established between chamber 17 and chamber 16. From chamber 16 leads an exhaust or drip pipe 30.

The operation of the device is as follows:

The rotation of druml causes the pipes 1 1 and f 20 and the swivel block 8 to revolve with it. Steam enters through pipe 5 into the fixed casing 6, and thence finds its way through radial ports 9 into chamber 10, and thence through pipe 1 1 into the chamber 12 and roll 1. The exhaust steam or water is forced back through pipe 20 into chamber 17.

"From chamber 17 it passes through ports 18,

and slots 28, 29 into chamber 16 and out by exhaust pipe 30. Thus it will be seen that the packing rings 24, 25, 26 and 27 serve at all times to keep the live steam separate from the exhaust, and are the only parts of the device subject to wear. vious, can be readily removed and renewed at small expense. It will also be noted that by the above construction, there is provided 'but a single steam tight joint and this is so arran ed that it serves to take c-are of both the i et and exhaust passages. This is a decided advantage.

The necessary pressure between the packing rings and their coperating faces is secured by means of a spring 31, arranged within the tubular extension 14 of the head 13 and conned between two caps 32 and 34. The tension of this spring may be adjusted by means of set screw 35 held by lock nut 36. A wearing pad or shoe 33, preferably of some soft material, is employed between cap 32 and the face of the swivel block.

In Figs. 5, 6 and 7, there is shown a simple Havingy thus described my invention, I-

claim as new and desirel to secure by Letters- Patent:- y l 1. A pipe joint for revolving lournals, comprising a fixed casing with w ich one pipe communicates a swivel block centrally dls- These rings, it is obposed in said easing,` spaced apart therefrom, and provided with a plurallty of ports, and a dischargev pipe screwed centrallyinto said block, and communicating with said ports.

2. Means for supplying steam to a rotating drum, comprising a fixed casing in communication with the steam supply, a perforated j at one end, in this chamber, and at the other end in the revolving drum.

4. In a revolving steam tight ipe joint, a casing, a swivel block mounted) therein, a pipe connected with saidl swivel block, a seal- .ing element between one face of said swivel block and the casing, and means acting u on the other face of said swivel block for holding it against the sealing element.

5. In a steam tight, revolvin pipe joint, a sealing member comprising a plate provided on each face with a plurality of packing elements.-

6. In a steam tight, revolving ipe joint, a sealing member comprising a p ate or disk, and a plurality of concentric packing rings let into each face of the plate.

7. In a pipe joint, a casing, a member swiveled therein carrying a pipe, and a packing member sea-ling 'the joint between the swiveled member and casing, and supported loosely by-a flange on said casing.

8. In a rotating pipe joint for hollow journals, a casing, a removable head therefor, a swivel block, and a packing element within said casing, the arrangement being such that both said last named elements can be removed when the head is removed.

9. A sealing element for rotating pipe joints, comprising a plate, a plurality-of packing rings let into each side of the plate, and a plurality of apertures formed in said plate, between the packing rings.

10.l Means for supplying steam to hollow revolvingdrums whlch comprises a feed pipe screwed into said drum, an outlet pipe within said feed pipe and also communicating with said drum, a swivel block intowhich both pipes are secured, a fixed casing surroundmg said pipes and swivel block, said casing comprlsmg two chambers, ax supply feed and outlet pipes connect, and two sets' of ports establishing communication beapertures in the walls of said casing adapted tween the two sets of chambers. to register therewith. y 10 11. Ina revolving pipe joint, a c lindrical In testimony whereof, I affix my signature casing to which fluid may be supp `ed, a cyin presence of two witnesses. lindrical swivel block carrying an outlet ipe JOHN G. LIDDELL.

arranged to turn within said casing, pac 1g Witnesses: means between the casing and swivel bloc CLARENCE A. BARNES,

provided with apertures, and corresponding H. WARE BARNUM. 

